Clinical Effects of the Probing Method with Depth Gauge for Determining the Screw Depth of Locking Proximal Humeral Plate

Figure 1

Probing method with depth gauge: (a) after perforating the lateral cortex, predrilling additional length of the cancellous bone with the locking drill sleeve to form a screw track with right direction; (b) removing the sleeve, the depth gauge was used to be advanced by hand; (c) a firm end point was felt, which indicated the tip reached the area close to subchondral bone; (d) verifying the position of the depth gauge with fluoroscopy.

(a)

(b)

(c)

(d)